"Why Steve Ditko Quit"https://www.youtube.com/watch?v=xe21fi7wAxwA really exceptionally well-produced and informative 22-minute video of Ditko's life, artistic career and Ayn Rand-based objectivist beliefs, as manifested in the stories, characters and career decisions he made.
I learned a heck of a lot I didn't know about Ditko from this video.